Railway-brake.



W. R. CHANDLER.

RAILWAY BRAKE.

APPLICATION FILED JAN. 16. 1917.

Patented June 12, 1917.

J M W UN T WILLARD R. CHANDLER, OF SUMTER, SOUTH GARGLINA.

RAILWAY-BRAKE.

Specification of Igtters Patent. Patented June 12, 1917- Application filed January 16, 1917-; Serial No. 142,686.

To all whom it may concern.

Be it known that I, WILLARD R. CHAND- LER, a citizen of the United States of America, residing at Sumter, in the county of Sumter and State of South Carolina, have invented certain new and useful Improvements in Railway-Brakes, of which the following is a specification.

The present invention relates to improvements in railway brakes, and is designed especially to improve the construction of the brake shoe and brake head in certain particulars for the purpose of prolonging the life of the brake shoe and rendering impossible the falling to the track of parts of the shoe should it become broken in any Way. Many accidents, with consequent loss of life and damage or breakage of parts, are frequently caused on railroads by the falling to the railroad trackof a broken brake shoe or part ofthe shoe and consequent derailment of a car. when its wheels pass over the obstruction. By the utilization of my invention, the durability of the brake shoe is enhanced and the possibility of parts of a broken shoe falling to the ground is practically eliminated. In the accompanying drawings 1 have illustrated onecomplete example of the physical embodiment ofmy invention constructed and arranged according to the best mode I have so far devised for the practical application of the principles of my invention.

Figure 1 is a side view of a brake according to my invention, showing a car wheel in dotted lines, and the brake hanger or supporting strap, together with the end of the brake beam to which the head is attached.

Fig. 2 is a sectional view of the brake shoe illustrating the steel backingmembers of the shoe.

Fig. 8 is a perspective view of the brake head.

- Fig. 4 is a detail perspective view of one of the duplex steel backing plates.

The brake itself is of the proper size and shape to conform to the standard required by the M. C. B. and embodies the customary members indicated as the head 1 and the shoeEZ, the former being of cast metal and formed with a projecting lateral lug forming a strengthening bridge or brace 3 while the central projecting lug 4 of the head is transver e y perforated. at 5 to permit t brake: being supported on the brake beam 6, which preferably is round. The brake is adjustable on the beam and to hold the former in fixed position on the latter I employ a set bolt 7. Located centrally of the head and opening at the front thereof is a mortise 8' partly closed at one side of the head by the bridge 3 and extending backward in the head to open outwardly into extension 9 thus forming a T-shaped mortise, open at both ends except, as before stated, for the bridge The mortise is adapted to accommodate the tenon 10 of the shoe which is located centrally thereof and projects backward therefrom and is adapted to slide neatly into the mortise while an opening 11 in the tenon is provided for the bolt 12 for attaching the straps 13, one at each side of the shoe for suspending the, brake.

To strengthen the brake shoe I employ a pair of steel backing plates as it and 15 which are embedded in the metal of the shoe and cast therein above and below the center of the tenon. l

These duplex plates each have a bent inner end 16 which terminates in a lug .17 formed by bending over thefextreme end of the plate and crimping it or clamping it into a guide lugwhich projects from the tenon at its corners and these two lugs are adapted to fit neatly into the extension 9 of the mortise in the head. At the opposite ends of the steel backing plates another an gular flange 18 is provided complementary to and embedded in the lugs-18' of the shoe proper. Each plate is formed with an ex tension 19 which is provided by stamping a hole or opening 20 and the ektension projects on a line with the body of the/plate at an angle to the flange 18. Together with the'two openings 2121 in the plate or backing strip the opening or slot 20 provides-for an interlocking key passing through the plate and joining the metal at opposite sides of the plate.

Should the upper or lower portion of the shoe break it will be seen that the steel plates will hold the cracked or broken parts from falling, and one of the special features of the invention resides in the use of the two plates, instead of one extending throughout the entire length of the shoe. back strips or plates permit expansion and c ntracti n f the cast m tal. of he shot The short Without breaking or cracking. The bent ends 17 of the steel plates or backing strips as will be seen are strengthenedby being bent back upon themselves thus providing a rigid projecting lug at the corners of the lug 10. As before stated, the steel backs or platesare cast in the cast metal of the shoe when the latter is being molded. a

What I claim is 1. The combination with a brake head having a T-slot therein, of a brake. shoe formed with a corresponding T-lug, said lug having a pair of backing plates emcopies of this patent may be obtained for five cents each, by addressing the bedded therein and each plate having a prolocking openings for keys of cast metal, and

the ends of said plates projecting from the shoe to form part of the T-lug.

In testimony whereof I aiiix my signature.

WILLARn R. CHANDLER.

Commissioner of Patents,

Washington, D, G. 

